Antenna Interface; Umts Antenna Interface; Pin Definition; Operating Frequency - Quectel UC20 Manual
Umts/hspa module series
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Also See for UC20:
- Hardware design (83 pages) ,
- User manual (33 pages) ,
- Application note (30 pages)
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5
Antenna Interface
UC20 antenna interface includes a main UMTS antenna, an optional UMTS Rx-diversity antenna, which
is used to improve UMTS's receiving performance, and a GNSS antenna. The antenna interface has an
impedance of 50Ω.
5.1. UMTS Antenna Interface
5.1.1. Pin Definition
The main antenna and UMTS Rx-diversity antenna pins definition are shown below.
Table 25: Pin Definition of the RF Antenna
Pin Name
Pin No.
ANT_MAIN
49
ANT_DIV
35
5.1.2. Operating Frequency
Table 26: The Module Operating Frequencies
Band
UMTS 1900
UMTS 850
5.1.3. Reference Design
The reference design of main antenna and UMTS Rx-diversity antenna is shown as below. It should
reserve a π-type matching circuit for better RF performance. The capacitors are not mounted by default.
UC20_Hardware_Design
I/O
IO
AI
Receive
1930 ~ 1990
869 ~ 894
Confidential / Released
UMTS/HSPA Module Series
Description
Main antenna
Diversity antenna
Transmit
1850 ~ 1910
824 ~ 849
UC20 Hardware Design
Comment
50Ω impedance
50Ω impedance
Unit
MHz
MHz
58 / 84
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